Motor-controller.



P. P. TOWNSEND.

MOTOR CONTROLLER.

APPLIGATION'IILED JULY 16, 1906. I

Patented Jan. 19, 1909.

3 SHEETS SHEET 1.

F. P. TOWNSEND.

MOTOR CONTROLLER.

APPLICATION FILED JULY 16. 1906.

Patented Jan. 19, 1909.

P P. TOWNSEND.

MOTOR CONTROLLER.

APPLICATION FILED JULY 16, 1906.

91 QORRO Patented Jan. 19, 1909.

3 SHEETS-SHEET 3.

Q S WITNESSES. 7\ IIVVEMTOR. myab'm JWM ATTORNEY.

Rm MWTJZDU i my invention, I employ two motors to driye UNITED STATES PATENT oFFIcE.

FRANK P. TOWN SEND,-OF ELYRIA, OHIO, ASSIGNOR TO THE CUTLER-HAMMER MANUFAC- TURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

MOTOR-CONTROLLER.

Specification of Letters'Patnt.

Patented Jan; 19, 1909.

Application fileil July 16, 1906. Serial No. 326,468.

To all whom it may concern:

Be it known that I, FRANK P. TOW SEND,

a citizen of the United States, residing at; Elyria, in the county of Lorain and State ofOhio, have invented new and useful Improvements in Motor-Controllers, of which the following is a full, clear, concise, and exact description, reference beingihad' to the accompanying drawing, forming a part of this specification.

' the slab. Each table isprovided with carrying rolls which are driven to'pass' the slab" back and forth through the working. rolls. In order to distinguish the tables from each other, I shall designatefone the right table and the other the left table. 7 When the mill is in operation, theslab is passed from the right table through the working rolls to the left table, then from the left t'able through the working rolls to the right table, and so on back and forth through the working rolls from one table to the other until it is brought: into the proper form. When either table feeds the slab to the work-- ing rolls, it runs in the forward direction, and when either table, draws the slab from the working rolls it runs in'the reverse direction. It has been the practice heretofore to operate both tables simultaneously, one being operated in the forward direction and the other in the reverse direction, so that one table feeds the slab to the working rolls while the other table draws it therefrom.

According to my invention, the tables are runalternately I in the forward direction without operating either table in the reverse direction, save when the slab will not pass entirely through the rolls unless it is drawn In accordancewith-the preferred form of the tables, one motor being provided for each table. The motors are so connected to the tables that both the motors I and the tablesv are independent. The motors are preferably controlled by means of two automatic controllers, one for each motor. These controllers mayassume any suitable form.

'Both controllers arepreferably controlled by means of a single master controller which the operatoror attendant may operate atwill to cause such operation of the motors as may be required. The controlling apparatus which 'I thus provide is adapted to be so operated that it will cause the motors,

and, consequently, thetables to operate alternatelyin the forward direction, while allowing either table to remain idle while the other is in operation. I preferably provide the controlling apparatus with, means by which either motor, and, consequently, either table, may be run in the reverse direction, if

,an occasion should arise to requiresuch OPBI'ELUOII. It will, of course, be understood 1 that my controlling'apparatus mayassume .various forms, and that it may be used for purposes other than those which I particularly set forth. Furthermore, certain features of my invention are applicable to various forms of apparatus.

In order to more particularly explain-the nature of my invention, I have illustrated a rolling mill and controlling apparatus wherein my invention is embodied IIIOIIB of the. forms that it may assume.

The several views in the accompanying drawings are as follows:

' Figure 1 is a diagrammatic plan view of a rolling mill and the motors which are employed to operate the tables, Fig. 2 is a diagrammatic view of the controlling apparatus for the motors, Fig. 3 is -'a diagrammatic view of an automatic multiple switc' motor controller which may be used int, e

controlling apparatus, and Fig. 4 is a diagrammatic plan of the drum of the master controller. I

Fig. 1' shows one form of rolling mill which my system may be employed to operate. 'It is provided with'two tables A and. V B, between which are arranged working rolls 1. Eachtable is provided with a set of carrying rolls 3, which are geared to a shaft 4. Each table may be mounted upon,

bearings 5 so that it may be tilted.

I prefer. to employ two motors A and B to operate the tables A and B respectively,

-the motor A being geared to the shaft 4 of table A and the motor B being geared to the shaft 4 of table B. The motors A. and B are preferably mounted in substantially the same way as railway motors.

I shall first describe the controlling apparatus which is illustrated in Fig. 2. I employ two sets of controlling apparatus A B the set A being employed to control the motor A and the set B being employed to control the motor B Each set of con- .trolling apparatus may be provided with an automatic rheostat and a reversing switch. Both sets of controlling apparatus are controlled by means of a master controller M. Fig. 4 is a diagrammatic plan view of the drum of the master controller. It will, of course, be understood that the master controllermay assume various forms.

I shall now describe the operation of the controlling apparatus. The master control ler may be provided with stationar contact fingers 6,7, 8, 9, 10, 11, and 12. The eft hand side of the drum of the master controller may be provided with segments 13, 14, 15, 16, and 17, and the right hand side thereof may be provided with segments 18, 19, 20, 21, and 22. It may be assumed that the master controller is moved so that the left hand segments come into engagement with the contact fingers. When the contact fingers reach the position 1 closed from-the positive line through conductor 23, finger 12, segment 17, segment 16, finger 11, conductor 24, reversing switch solenoid 25, conductor 26, and conductor 27 to the negative line. Thesolenoid 25 will then close the reversing switch, therebyclosing the motor circuit from the positive line through field 28,- conductor 29, contact 30, conductor 31, armature 32, conductor 33, contact 34, conductor 35, starting resistance 36, contact arm 37 and conductor 27 to the negative side of the line. The motor will thus be started with all the starting resistance in circuit. When the contact fingers reach the position 2*, circuit will be closed from the positive line through conductor 23, segment 17 segment 15, finger 9, conductor 38, rheostat solenoid 39, to the negative side of the line. The solenoid 39- will then raise the contact arm 37, causing it to .pass over contacts 40 to remove the starting resistance from circuit. The movement of the contact arm will be retarded by the dash-pot 41. The motor A will thus be started and drive the left hand table in a forward direction so as to feed the slab to the working rolls. If it be desired to run the table B in a reverse direction so that it will draw the slab from the working rolls, the motor B may be. started in the reversedirection by further moving the master controller to bring the contact fingers into the. positions 3 and 4 When the contact fingers reach the third position, circuit will. be closed from the positive line through the circuit will be conductor 54,.starting resistance arm 56 and conductor 45 to the negative side of the line. The motor 13 Wlll thus be started in the reverse direction with all the starting resistance 55 in circuit. lVhen the contact fingers reach the position 4, circuit will be closed from the positive line through conductor 23, finger 12, segment 17, segment 13,

finger 6, conductor 57, rheostat solenoid 58,

and conductor 45 to the negative side of the line. The solenoid 58 will then move the contact arm 56 over the contacts 59 to remove the starting resistance from circuit. The movement of the contact arm 56 will be retarded by the dash-pot 60. The motor B will thus be started and drive the table 13 in the reverse direction so as to draw the slab from the working rolls.

In order to stop tables A and B the handle of the master controller is returned to its initial position. The controlling circuits of the'motor controllers are thus opened and consequently the motors A and B are stopped.

I n order to feed the slab back to the working rolls from table B, the master controller is turned so as to bring the right hand segments into engagement with the contact fingers. lVhen'the contact fingers reach the position 1 circuit will he closed from the positive line through conductor 23, finger 12, segment 22, segment 19, finger 8, conductor 61, reversing switch solenoid 62, conductor 44, and conductor 45 to the negative side of the line." The reversing switch will then close the motor circuit from the positive line through series field 46, conductor 47, contact 63, conductor 52, armature 51, conductor 50,, contact 64, conductor 54, starting resistance arm 56, and conductor 45 to the negative side of the line. When the contact fingers reach the position 2 circuit will be closed from the positive line through conductor 23, finger 12, segment 22, segment 18, finger 6, conductor 57 rheostat solenoid 58, and conductor 45 to the negative side of the line. The solenoid 56 will then move the contact arm 56 over the contacts 59 to remove the starting resistance 55 from circuit. The motor B will thus be started and drive the table B in the forward direction so as to feed the slab to the working rolls 1.

. I fit be desired torun the table A in a reverse direction so as to draw the slab from the working rolls, the master controller may be turned further so as to bring the contact fingers into the positions 3* and 4'. When the contact fingers reach the position 3, circuit will be closed from the positive line through the conductor 23, finger 12, segment 12. segment 21, finger 10, conductor (35. solenoid on. conductor 26 and conductor 27 to.

the negative line. The solenoid (36 will then close the reversing switch of the controlling apparatus A thereby closing the circuit to the motor A from the positive line through field 28, conductor 28), conductor 67, contact (38, conductor 33, armature 32, conductor 31, contact 69, conductor 35, resistance 36, arm 37, and conductor 27 to the negative line. When the contact fingers reach the position st", circuit will beclosed from the positive line through conductor 23, finger 12, segment 22, segment 20, finger 9, conductor 38,

rheostat solenoid 3!), and conductor' 27 to the negative line. The solenoid 39 will then draw the contact arm 37 over the contacts 40 to remove the starting resistance 36 from circuit. The motor A will thus be started in the reverse direction and drive the table A forms of controlling apparatus may be employed for the motors. The apparatus which I have illustrated has beenselected merely for the purpose of explaining the general features of my invention.

The multiple switch starter which is illustrated in Fig. 3 iscspecially adapted for starting large motors, such as are employed for operating'rolling mills. It is provided with a plurality of accelerating switches a, a, a and (1 which are operated by solenoids, b, Lgza and 6 respectively. Theac-.

(tolerating-i switches carry auxiliary switches c, c and 0 respectively. The sections of starting resistance fl, CP, (1 and cl", are arranged to be short-circuited by the accelcrating switches a, a, a and a respectively. The solenoids b, .7), b andb may be connected to the conductor 38 which extends from the contact finger 9 of the master controller. The circuits of these solenoids are so arranged that when the solenoid 7i closes the accelerating switch a, the auxiliary switch 0 closes the circuit to the solenoid 6 when the solenoid b closes the switch a the auxiliary switch 0 closes the circuit to the solenoid 5 and when the solenoid b closes switch a the auxiliary switch ccloses the circuit of the solenoid 6 These solenoids are thus made to respond successively so that the accelerating switches will be closed one after, another to remove the sections of starting resistance from circuit. one by one. In order, that. the solenoids will not respond in too rapid succession, I provide, an arresting device which is responsive to the motor current. The arresting device is provided with a plurality of relay switches c, 6 6 and c which are arranged one in the circuit of each of the solenoids b, If, 7)", and I). These relay switches are connected to the core of a relay solenoid 7, which is arranged in circuit in series with the armature of the motor A The reversing switch is provided with switches g, g g and which are operated by solenoids h, it h and [L3 respectively. The solenoids i2. and h are connected to the conductor 24: which is connected to the contact finger 1-1 of the master controller. The solenoids/2. and k are connected to the conductor 65 which is connected to contact finger 10 of the master. controller.

I have illustrated the multiple switch controller as it would be arranged it it were used in place of the controlling apparatus A which is shown in Fig. 2. I shall now describe the operation of the multiple switch controller. Assuming that. the master controller be moved so that the left hand contact segments engage the contact. fingers, circuit is first closed fronr condnctorfli, through solenoids h and 72 conductor 70, conductor? 1, and conductor 72 to the negative side of the line. The solenoids h and hi then close the switches g and and the motor circuit will be closed from the positive line through field 28, conductor 73, conductor 74, switch g, conductor 75, armature 3Q. conductor 76, conductor 77, switch conductor 78, relay solenoid f, resistance (Z (Z (Z and (7, and conductor 79 to the negative side of the line. 'lhemotor will thus be started with all the starting resistance in circuit. When the contact fingers reach the position 2:. circuit will, be closed from conductor 38 through' conductor 80, solenoid Z), conductor 81, relay switch 0. and conductor 72 to the negative side or the line. The accelerating switch a will then be closed and short-circuit the section of starting resistance (Z. The auxiliary switch 0 willalso be closed, thereby closing the circuitof solenoid 0, around relayswitch 6, through auxiliary switch 0, accelerating switch a, and conductor 79. -Therel.av

switch will thus be short-circuitedand, there ing switch 'a and the auxiliary switch will then'be closed by the solenoid b. t The section (Z of the starting resistance will then be short-circuited by the accelerating switch (L If the motor current rises to a certain v degree after the section of starting resist? ance d is removed from circuit, the relay solenoid f will open the relay switches e, e, 6 and-e In consequence the operation of the succeeding.acceleratin switcheswill be arrested, as the circuits of the solenoids thereof will be opened by the relay switches. As soon as the motor current decreases the relay solenoid will allow the relay switches toclose, and then the solenoid b will respond and close the switch a. Inasmuch as the auxiliary switch a short-circuits the relay switch 6, said relay switch may be opened without deenergizing thewinding b. The auxiliary switch 0 serves'to close the circuit of the solenoid b and also short circuit the relay switch e and the auxiliary switch 0 serves to short-circuit the relayswitch 6 Without following out the operation of each witch in detail, 1t will be understood that he accelerating switches are closed successively to remove the sections of starting resistance from circuit. one by one and that if the motor current becomes too great, the relay solenoid f will open the relay switches to arrest the operation of the accelerating switches until the motor current subsides.

The motor will be operated in the reverse direction if the master controller be moved so that the right hand contactsegments engage the contact fingers. When the contact fingers reach the position 3 circuit will be closed from the conductor 65 through solenoids 7L2 and k to conductor 71. The motor circuit will then be closed from the positive line through field 28, conductor 73,

switch 9 conductor 76, armature 32, conductor 75, switch to therelay switch When the contact fingers reach the position 4, circuit will be closed from the conductor 38, thence through the solenoids b, 5 b and 6 as previously described, and accordingly the accelerating switches will be closed successively to remove the starting resistance from circuit.

It will be understood that my invention in its broadest aspect is not limited in any Way to the details which I have particularly set forth herein in explaining the apparatus which I have illustrated.

In order to enable me to clearly set forth .my invention in the claims, I have specified two motors. I intend, however, that my claims shall comprehend instances where more than two motors are controlled in the manner contemplated by myinvention.

Having thus described my invention, what{ by Letters Pat- I claim and desire to. secure enhis,

1. In combination, two motive power de- V vices and controlling apparatus by means of wvhich the operation of said devices may be directed so that said devices may be run either alternately in opposite directions or simultaneously in one direction.

2. In combination, a rolling mill having two tables for carrying the work and passing it back and forth through the working rolls, two motive power devices, one for each table, and controlling. apparatus by means of which the operation of said devices may be so directed that said devices may be run either alternately or simultaneously at will.

3. In combination, two electric motors and controlling apparatus by means of which the operation of said motors may be so di rected that the same may be run either alternately in opposite directions or simultaneously in one direction.

4:. In combination, two. electric motors and controlling apparatus by means of which the operation of said motors may be so di-. rected that the same may be run either alternately inthe forward direction, or simultaneously, one in the forward direction and the other in the reverse direction.

5. In combination, a rolling mill having two tables for carrying the work and passing it back and forththrough the working rolls, two electric motors, one for each table for operating said tables, and controlling apparatus by means of which the operation of said motors may be so directed that said motors may be run either alternately or simultaneously.

6.. In combination, a rolling mill having two tables for carrying the work and passing it back and forth through the workin rolls, two motors, one for each table, for riving said tables, and controlling apparatus by means of which the operation of said In tors may be so directed that the same may be run either alternately in the forward direction, or simultaneously, one in the forward 110 direction and the'other in the reverse direction.

7. In combination, two motive power devices, a controlling device for each motive power device, and a master controller for 115 said controlling devices by means of which said motive power devices may be caused to rmiil either alternately or simultaneously at m i .8. In combination, two motive power de- 120 .vices, two controlling devices, one for each motive power device, and a master controller for said controlling devices by means of .which the operation of said controlling devices may be so directed that said motive 125 power devices will b caused to run either alternately in the forward direction or simultaneously, one in the forward direction 'and'the other in the reverse direction.

9.1111, combination, arolling mill having 1 two tables for carrying ,the work and passing it back and forth through the working rolls, two motive power devices, one for each" table, for driving said tables, a controlling device for each motive power'device, a master controller for said, controlling devices by means of which said controlling devices may be operated to cause said-motive power devices to run said tables either alternately or simultaneously.

10. In combination, a rolling mill having two tables for carrying the work and passing it back and forth through the Working ro ls, two motive power devices, one for each table, for driving said tables, controlling devices,one for each motive power device, and a master or Lroller for said controlling devices by means of which said controlling devices may be-opera-ted so as to cause said motive power devices to drive, said, tables either alternately in the forward direction or simultaneously, one in the forwarddirection and the other in the reverse, direction.

11. In combination, two electricmotors, two controlling devices, one for each, motor, and a master controller for said controlling devices by means of wvhich said motors may be caused torun either alternately or 'simultaneously at will.

12. In combination, two electric, motors, two controllingdevices, one for each motor,

and a mastercont rollerfor said controlling devices by means of which said motors may be caused to run either alternately in the forward direction, or simultaneously, one in the forward direction and the other in-the reverse direction. I e

13. In combination, a rolling mill having two tables for, carrying the work and pass mg it back and forth through the. working rods, t wo motors one for .each' table for driving said tables, two controlling devices,

one for each motor, and a master controller for said controlling devices by means of which said motors may becaused to drive said tables either alternately in the forward direction, or simultaneously, one in the forward direction and the other in the reverse direction.

14. In combination, two motors, a controlling device for each motor having anautomatic rheostat and a reverse switch, and a master controller for said controlling devices my means of which the operation ofsaid'controllin devices may bedirected so' as to cause sai nately"obsimultaneously. 4

15. In combination, two electric motors,-a controlling device for each motor havin an .automatic rheostat and a reversing switch,

and a master controller for said controlling devices by means of which the operation of said 'controllin devicesmay be directed so as to cause sai motors to run'either alter 'nately in the forward direction or 'simult'as "and drive said tables either alternately in the motors to run either alter .ation 0- said tables take place after either neously, one in the forward direction and the other inthe' reverse direction.

, 16. In combination, two electric motors, a controlling device for each motor having an automatic rheos'tat and a reversing swltch, and a master controller for said controlling devices by means of which the operationof said controlling devices may be so directed. that the first motor may be run in the forward direction. alone, and'then bothifnotors run simultaneously, the rst in the forward direction and the second the reverse dlirec tion, or the second motor may be run alone and then both; motors run simultar'leously", the second in the forward direction and the first in the reverse direction.

' 17. In combination, two motors, a controlling device for each motor havin an auto matic multiple switch starter. an a reversingswitch, and a master controller by means of which the operation of said controlling devices may be so directed that the motorsmaybe run either. alternately in the" forward.-

direction, or simultaneously, one in the for- "ward direction and the other in the reverse v direction.

18. In combination, a rollin' mil having two working tables for carrying e work passin vit back and forth through the working ro ls, two electric motors, one for each table, for driving/said tables, two controlling devices, one for each motor, having a magnetically operated reversingsvtitch and a magnetically operated rheostat, and a' master controller for said controlling de;

vices by means of which the operationof oth controllers maybe sodirected that'the motors may be caused to drivesaid tables either alternately in the forward direction orsi-multaneously, one-in the forward .direc ti on and the other in the reverse direction."

/ 19. In combination, a rolling mill having two working tables for carrying thework and passing it back and forth through the" working rolls, -.two electric motors, one for each table, for driving said tables, two controlling, devices, one for each motor, each havil'ig "a magnetically operated reversing switchand a magnetically? operated rheol stat, and .amaster controller for said, controlling devices by means of which the o eraztion Lot both controllers may be so i- I'ected that the motors may be caused to forward direction or simultaneously, onein 120 20. In combination, a rolling mill h a'ving two working tables'ada ted to carry the work and'pass it back an jforthlthrough the workin rolls, two motors, one for each table, or driving said tables, two controlling devices, one for each motor, each having a magnetically operated multiple switch rheostat and a magnetically operated reversing switch, and a master controller by means of which the operation of said controlling devices may be so directed that the motors may be caused to drive the tables either alternately in the forward direction or simultaneously,one in the forward direction and the other in the reverse direction.

21. In combination, a rolling mill having two tables adapted to carry the work and pass it back and forth through the working rolls, two motors, one for each table, for driving said tables, two controlling devices, one for each motor, each having a magnetically-operated multiple switch rheostat and a magnetically-operated reversing switch,

eio ee and a master controller by means of which the operation of said controlling devices may be so directed that the motors may be caused to drive the tables either alternately in the forward direction, or simultaneously, one in the forward direction, and the other in the reverse direction, said master controller being adapted to make the simultaneous operation of said tables take place after either table has been operated alone.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses,

FRANK P. TOWNSEN Witnesses:

C. T. HENDERSON, QUINCY A. GILLMORE. v 

